Signaling system.



No. 789,778. PATENTED MAY 16, 1905.

4 J. A. WILSON.

SIGNALING SYSTEM.

APPLIOATION FILED SEITJB, 1904.

. WITNESSES:

N W WA/ukn WAWORNEY UTTnn STATES Patented May 16, 1905.

PATENT Trice.

JOSEPH A. lVILSON. OF WESTFIELD, NEW JERSEY, ASSIGNOR TO THE HALL SIGNALCOMPANY, A CORPORATION OF MAINE.

SIGNALING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 789,778, dated May 16,1905.

Application filed September 13,1904. Serial No. 224,233.

To (all whom it may concern.-

Be it known that .l, Josnrn A. WILSON, a citizen of the United States,whose permanentpostofficc address is VVcstfield, New Jersey, and whosetemporary post-office address is Thirsk, county of Yorkshire, England,have invented certain new and useful Improvements in Signaling Systems,of which the following is a specification.

This invention relates to improvements in electric signaling systems forrailways.

The invention seeks to provide an efficient and simplified arrangementof circuits and connections and such as is adapted to control andoperate home and distant signals. The invention also seeks to provide anefficient and simple arrangement whereby a signal may be operated andcontrolled over two sections oftrack.

The invention also seeks to accomplish its various purposes without theuse of polarized relays.

1n the accompanying drawing two complete blocks of a system embodyingthe invention are shown diagrammatically.

Referring now to the drawing, 1, 2, 3, and 4 are successive blocks ofthe railway, each including a separate insulated track-section. 5 and 6are the home and distant signals located at the entering end of block 2.7 and 8 are the home and distant signals at the entering end of block 3.9 and 10 are the home and distant signals at the entering end of block4. In the present embodiment of the invention these signals are shownnormally at safety, although, of course, the invention contemplates anarrangement of signals normally at danger.

11 and 12 are the clutch-magnets or other operating or controllingdevices for the signals 5 and 6. 13 and 14 are corresponding operatingor controlling devices for signals 7 and 8. 15 and 16 are correspondingoperating or controlling devices for signals 9 and 10.

17 is a differential magnet located at theentering end of block 2. Thismagnet has two coils and is so arranged that when current traverses bothcoils in the same direction the magnet is energized and when currenttraverses the coils in the opposite directions the magnet isdeenergized. Coil 18 of magnet 17 is included in the track-circuit of 7block 2. This track-circuit includes battery 19, current reverser 20,rails of block 2, coil 18, and trackmagnet 21. The current-reverser isoperated by a suitable connection with the home signal 7, so that whenthis signal is at safety current from battery 19 liows through thetrack-circuit in the direction indicated by the arrows, and when signal7 is at danger current-reverser 20 is shifted, so that current fromtrack-battery 19 flows in the opposite direction through the trackcircuit. This current, through coil 18 of magnet 17, is made to coincidewith or differ from the direction of current in the other coil of magnet17. 22 is this other coil of magnet 17. It may be energized from anysuitable source, but is preferably energized from the signal-circuit ofsignal 5. This circuit is as follows: from battery 23, clutch-magnet 11,coil 22, circuitcontroller 24, and back to battery 23. Thesignal-circuit for distant signal 6 is from battery 23, clutch-magnet12, circuit-controller 25, wire 26, circuit-controllers 27 and 24, backto battery 23. Oircuit-controller 24 is operated by track-magnet21, andcircuit-controller 27 is operated by differential magnet 17 It will beseen that the signal-circuit for the distant signal 6 is controlled byboth magnets 17 and 21 and that signal-circuit for home signal 5 iscontrolled by magnet 21.

28 and 29 are the current-reversers in the track-circuits. associatedwith track-batteries 30 and 31 of blocks 1 and 3, respectively, andoperated with home signals 5 and 9, respectively.

32 and 33 are the track-magnet and differential magnet associated withthe circuits for block 3.

34 and 35 are the track-magnet and difierential magnet associated withthe circuits for block 4.

The signal-circuits for signals 7 and 8 are the same as those forsignals 5 and 6 and may be traced as follows: from battery 36 throughmagnet 13 for home signal 7, coil 37 of differential magnet 33,circuit-controller 38 operated by magnet 32, and back to battery. Thesignal circuit for distant signal 8 is from battery 36 throughclutch-magnet 14, circuit-controller 39, wire 40, circuit-controller 41operated by differential magnet 33, circuit-controller 38 back tobattery. The track-circuit of track-magnet 32 is the same as that fortrack-magnet 21 and includes battery 31, current-reverser 29,track-rails, coil 42 of magnet 33, and track-magnet 32. The

' circuits for clutch-magnets and 16 associated with signals 9 and 10and the track-circuit for block 4 are similar to those just describedand need not be traced.

In the normal condition and when the signals are at safety currentthrough both coils of a differential magnet flows in the same direction,so as to energize the magnet, as shown with reference to magnet 17.

The operation is as follows: A train entering block 2 shuntstrack-battery 19, thereby deenergizing coil 18 and magnet 21. Magnet 21releases circuit-controller 24, thereby deenergizing cluteh-magnets 11and 12 and putting signals 5 and 6 to danger behind the train. When thetrain enters block 3, it puts signals 7 and 8 to danger in the same way.The movement of home signal 7 to danger shifts current-reverser 20, sothat current through track-magnet 21 and coil 18 is re versed. Thisenergizes magnet 21 and closes circuit-controller 24, so thatclutch-magnet 11 is energized and signal 5 goes to safety. The reversalof current in coil 18 deenergizes differential magnet 17, because itneutralizes current flowing in the opposite direction through coil 22.This circuit-controller opens to keep clutch-magnet 12 deenergized anddistant signal 6 at danger. When the train passes beyond block 3, homesignal 7 returns to safety, thereby restoring current from track-battery19 through coil 18 to its normal direction, so as to energize magnet 17and put distant signal 6 to safety. When the train passes into block 4,it puts home and distant signals 9 and 10 to danger behind it and keepsdistant signal 8 at danger in the manner already described.

43 is a circuit-controller connected in a shunt around coil 18 andoperated by magnet 21, so

that when this magnet is energized circuitcontroller 43 will be openedand when the magnet is deenergized circuit-controller 43 will be closed.Thus when magnet 21 is first energized after the train has passed off ofblock 2 full current from track-battery 19 passes through magnet 21 andaround coil 18. This serves to increase the efficiency of a trackbatteryin its work of lifting the circuit-controllers 24 and 43. 44 and 45 arecircuit-controllers having a similar arrangement and associated,respectively, with magnets 32 and 34. Circuit-controllers 25 and 39 inthe circuits of distant-signal clutch-magnets 12 and 14, re-

spectively, are operated from the home signals 5 and 7, respectively.They are so arranged as to be closed at or about the time when the homesignals reach safety position and are opened when the home signals go todanger. distant signal from going to safety until after its associatedhome signal has already reached or about reached safety. Itis not Theirpurpose is to prevent the essential that the current-reverser bemechanically operated with the home signals themselves, although sucharrangement is preferred. These current-reversers may be operated by anymeans controlled by the train in the section next in advance.

While the complete system and its various features are shown in what isbelieved to be the best arrangement, it will be understood that thevarious features of the invention may be considerably modified in theirarrangement and association without departing from the scope of theinvention.

What I claim, and desire to secure by Letters Patent, is-

1. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils,. acurrent-reverser and a trackmagnet; and a signal controlled by both ofsaid magnets.

2. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; and a signal-circuit havingcircuitbreakers operated by said magnets.

3. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; a signal controlled by both of saidmagnets; and another signal controlled by said track-magnet.

4. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; atrack-circuit including the other of said coils, acurrent-reverser and a trackmagnet; and home and distant signals locatedat the same point, the home signal being controlled by said track-magnetand the distant signal being controlled by both of said magnets.

5. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; a signal-circuit controlled by bothof said magnets; and a signal-circuit controlled by the track-magnet.

6. In an electric signaling system, the combination of a diiferentialmagnet having two coils; a signal-circuit including one of said coils; atrack-circuit including the other of said coils, a current-reverser anda track-magnet, said signal-circuit being controlled by saidtraclemagnet; and a signal controlled by both of said magnets.

7. In an electric signaling system, the combination of a differentialmagnet having two coils; a signal-circuit including one of said coils; atrack-circuit including the other of said coils, a current-reverser anda track-mag net, said signal 'circuit being controlled by saidtrack-magnet; and another signal-circuit controlled by both of saidmagnets.

8. In an electric signaling system, the combination of home and distantsignals located at the same point; a differential magnet having twocoils; a circuit for the home signal including one coil of said magnet;a trackcircuit including the other of said coils, a current-reverser andatrack-magnet, said circuit for the home signal being controlled by saidtrack-magnet; and a circuit for the distant signal controlled by-both ofsaid magnets.

9. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atrack-section; a source of current for energizing one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrent-reverser, said current-reverser being located near the exit endof said track-section; means controlled by a train in advance of saidtrack-section for operating the current-reverser; and a signalcontrolled by both of said magnets.

10. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atrack-section; a source of current for energizing one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrent-reverser, said current-reverser being located near the exit endof said track-section; means controlled by a train in advance of saidsection for operating the current-reverser; a signal controlled by bothof said magnets; and another signal controlled by said track-magnet.

11. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atraclesection; a source of current for energizing one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrent-reverser, said current-reverser being located near the exit endof said track-section; means controlled by a train in advance of saidtrack-section for operating the current-reverser; and home and distantsignals located, at the entering end of said tracksection, the homesignal being controlled by said track-magnet, and the distant signalbeing controlled by both of said magnets.

12. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atrack-section; a signal-circuit including one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrent-reverser, said currentreverser being located near the exit endof said track-section; means controlled by a train in advance of saidtracksection for operating said current-reverser; and a signalcontrolled by both of said magnets.

13. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atrack-section; a signal-circuit including one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrent-reverser, said current-reverser being located near the exit endof said track-section; means controlled by a train in advance of saidtrack-.

section for operating said current-reverser; and home and dlstantsignals at the entering end of said traclesection, the home signal beingcontrolled by said track-magnet, and the distant signal being controlledby both of said magnets.

14. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; a shunt connection around said othercoil of the differential magnet adapted to be closed when thetrack-magnet is deenergized and to be opened when the track-magnet isenergized; and a signal controlled by both of said magnets.

15. In an electric signaling system, the com bination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; a shunt connection around said othercoil of the ditferential magnet adapted to be closed when thetrack-magnet is deenergized and to be opened when the track-magnet isenergized; and a signal-circuit having circuitbreakers operated by saidmagnets.

16. In an electric signaling system, the combination of a differentialmagnet having two coils; a source of current for energizing one of saidcoils; a track-circuit including the other of said coils, acurrent-reverser and a trackmagnet; a shunt connection around said othercoil of the differential magnet adapted to be closed when thetrack-magnet is deenergized and to be opened when the track-magnet isenergized; a signal-circuit controlled by both of said magnets; and asignal-circuit controlled by the track-magnet.

17 In an electric signaling system, the combination of home and distantsignals located at the same point; a differential magnet having twocoils; a circuit for the home signal including one coil of said magnet;a track-circuit including the other of said coils, a current-reverserand a track-magnet, said circuit for the home signal being controlled bysaid track-magnet; a shunt connection around said other coil of thediflerential magnet adapted to be closed when the track-magnet isdenergized and to be opened when the track-magnet is energized; and acircuit for the distant signal controlled by both of said magnets.

18. In an electric signaling system. the com-' bination of'aditferentialmagnet having two COIlS and located near the entering end of atrack-section; a source of current for energizing one of said coils; atrack-circuit in-' cluding the other of said coils; a track-magnet and acurrent-reverser, said current-reverser being located near the exit endof said tracksection; means controlled by a train in advance of saidtrack-section for operating the cur- V rent-reverser; a shunt connectionaround said other coil of the differential magnet adapted to be closedwhen the track-magnet is deenergized and to be opened when thetrack-magnet is energized; and a signal controlled by both I of saidmagnets.

19. In an electric signaling system, the combination of a differentialmagnet having two coils and located near the entering end of atrack-section; a signal-circuit including one of said coils; atrack-circuit including the other of said coils, a track-magnet and acurrentreverser, 'said current-reverser being located near the exit endof said track-section; means controlled by a train in advance of saidtracksection for operating said current-reverser; a shunt connectionaround said other coil of the differential magnet adapted to be closedwhen the track-magnet is deenergized and to be opened when thetrack-magnet is energized; and a signal controlled by both of saidmagnets.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH A. W1LSON.

Witnesses:

R. WESTACOTT, ALFRED NUTTING.

